So... here's the deal: Don't do the event until Nexon clears it. A bunch of people are complaining that they've been crashed by the event and now I've experienced so first hand. I don't even know if they're planning to fix it.

UPDATE: Stay FAR away from the event and Dunbarton. At this moment both are unsafe due to hackers. For assured safety, get yourself to Tir Chonaill or Tara where they can't touch you. If you find the need to enter Dunbarton, go into to combat mode and stay in combat mode. GMs are looking into this, they have been informed.